Some Environmental Factors Effects on Species Composition, Catch ...

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Aug 15, 2011 - Key words: Caspian Sea, Catch, Invader species, Iran, Kilka, Sea level ..... (Trachurus mediterrraneus ponticus) and sprat. (Sprattus sprattus ...
International Journal of Natural Resources and Marine Sciences 2011, 1 (2), 157-164

Some Environmental Factors Effects on Species Composition, Catch and CPUE of Kilkas in the Caspian Sea Hasan Fazli Caspian Sea Ecology Research Center, Sari, Iran Received: 16 November 2010 / Accepted: 22 February 2011 / Published Online: 15 August 2011

Abstract This study evaluates changes in species composition, catch, and CPUE of three species of kilkas in the Caspian Sea from 1961 to 2009. The effects of fluctuations in sea level rise and fall on the catch of kilka as well as the impacts of a recent invasion by Mnemiopsis leidyi (Ctenophora) were assessed in terms of species composition and CPUE of kilkas in the Iranian coastal region of the Caspian Sea. We found a negative correlation between long-term sea level changes and total catch (R2 = –0.56; P

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